CN105047118A - 反转电路及其驱动方法、触控显示面板和触控显示装置 - Google Patents
反转电路及其驱动方法、触控显示面板和触控显示装置 Download PDFInfo
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Abstract
本发明公开了一种反转电路及其驱动方法、触控显示面板和触控显示装置,所述反转电路包括输入模块和输出模块,所述输入模块用于根据第一输入端、第一电压端、第二电压端、第一信号端和第二信号端的输入信号控制所述第一节点的电位,所述输出模块用于在第一节点的电位控制下根据第一输入端、第三电压端和第三信号端的输入信号控制所述第一输出端的输出信号。本发明提供的技术方案通过分时驱动的方式在触控阶段将发光控制信号关闭,以降低触控电极的对地电容,从而降低了触控电极的阻容负载,提高了触控驱动频率,最终提高了触控精度。
Description
技术领域
本发明涉及触控显示技术领域,尤其涉及一种反转电路及其驱动方法、触控显示面板和触控显示装置。
背景技术
现有的触控显示面板将触控结构整合至显示面板之内,使得显示面板自身具有触控功能。然而,上述触控显示面板的触控电极的对地电容较高,导致触控显示面板的触控驱动频率较低,因此现有的触控显示面板的触控精度较低。
发明内容
为解决上述问题,本发明提供一种反转电路及其驱动方法、触控显示面板和触控显示装置,用于解决现有技术中触控显示面板的触控电极的对地电容较高,导致触控精度较低。
为此,本发明提供一种反转电路,包括输入模块和输出模块;
所述输入模块分别与第一输入端、第一电压端、第二电压端、第一信号端、第二信号端以及第一节点连接,用于根据所述第一输入端、第一电压端、第二电压端、第一信号端和第二信号端的输入信号控制所述第一节点的电位;
所述输出模块分别与第一节点、第一输入端、第三电压端、第三信号端以及第一输出端连接,用于在所述第一节点的电位控制下根据所述第一输入端、第三电压端和第三信号端的输入信号控制所述第一输出端的输出信号。
可选的,所述输入模块包括第一晶体管、第二晶体管和第一电容;
所述第一晶体管的栅极与所述第一输入端连接,所述第一晶体管的第一极与所述第一电压端连接,所述第一晶体管的第二极与所述第一节点连接;
所述第二晶体管的栅极与所述第一信号端连接,所述第二晶体管的第一极与所述第一节点连接,所述第二晶体管的第二极与所述第二电压端连接;
所述第一电容并联于所述第一节点与所述第二信号端之间。
可选的,所述输出模块包括第三晶体管和第四晶体管;
所述第三晶体管的栅极与所述第一输入端连接,所述第三晶体管的第一极与所述第三电压端连接,所述第三晶体管的第二极与所述第一输出端连接;
所述第四晶体管的栅极与所述第一节点连接,所述第四晶体管的第一极与所述第一输出端连接,所述第四晶体管的第二极与所述第三信号端连接。
本发明还提供一种反转电路的驱动方法,所述反转电路包括上述任一反转电路,所述第一电压端为高电平,所述第二电压端为低电平,所述第三电压端为高电平,所述反转电路的驱动方法包括:
第一阶段,所述第一输入端输入高电平,所述第一信号端输入低电平,所述第二信号端输入高电平,所述第三信号端输入低电平;
第二阶段,所述第一输入端输入低电平,所述第一信号端输入高电平,所述第二信号端输入低电平,所述第三信号端输入低电平;
第三阶段,所述第一输入端输入高电平,所述第一信号端输入低电平,所述第二信号端输入高电平,所述第三信号端输入低电平;
第四阶段,所述第一输入端输入高电平,所述第一信号端输入高电平,所述第二信号端输入低电平,所述第三信号端输入低电平;
第五阶段,所述第一输入端输入高电平,所述第一信号端输入低电平,所述第二信号端输入高电平,所述第三信号端输入高电平。
本发明还提供一种触控显示面板,包括上述任一反转电路,所述触控显示面板还包括基板,所述基板上设置有薄膜晶体管,所述薄膜晶体管上设置有发光二极管,所述发光二极管包括阳极、发光层和阴极,所述阴极包括至少一个触控电极,所述触控电极的上方设置有感应电极,所述触控电极与所述感应电极相互垂直形成触摸感应矩阵;
所述触控电极和所述感应电极用于在触控阶段加载触控驱动信号;
所述阳极用于在触控阶段不加载任何驱动信号。
可选的,所述薄膜晶体管包括栅极、有源层、源极和漏极,所述阳极与所述漏极连接;
所述阳极和所述阴极用于在显示阶段加载显示驱动信号。
可选的,还包括封装玻璃和保护玻璃,所述封装玻璃设置在所述感应电极和所述触控电极之间,所述保护玻璃设置在所述感应电极之上。
可选的,所述触控电极的形状为条状电极。
本发明还提供一种触控显示装置,包括上述任一触控显示面板。
本发明具有下述有益效果:
本发明提供的反转电路及其驱动方法、触控显示面板和触控显示装置中,所述反转电路包括输入模块和输出模块,所述输入模块用于根据第一输入端、第一电压端、第二电压端、第一信号端和第二信号端的输入信号控制所述第一节点的电位,所述输出模块用于在第一节点的电位控制下根据第一输入端、第三电压端和第三信号端的输入信号控制所述第一输出端的输出信号。本发明提供的技术方案通过分时驱动的方式在触控阶段将发光控制信号关闭,以降低触控电极的对地电容,从而降低了触控电极的阻容负载,提高了触控驱动频率,最终提高了触控精度。
附图说明
图1为本发明实施例一提供的一种反转电路的结构示意图;
图2为本发明实施例一提供的一种像素电路的结构示意图;
图3为图2所示像素电路的工作时序图;
图4为本发明实施例一提供的一种移位寄存器的结构示意图;
图5为图4所示移位寄存器的工作时序图;
图6为本发明实施例二提供的一种反转电路的驱动方法的流程图;
图7为本发明实施例二提供的一种反转电路的工作时序图;
图8为本发明实施例三提供的一种触控显示面板的结构示意图。
具体实施方式
为使本领域的技术人员更好地理解本发明的技术方案,下面结合附图对本发明提供的反转电路及其驱动方法、触控显示面板和触控显示装置进行详细描述。
实施例一
图1为本发明实施例一提供的一种反转电路的结构示意图。如图1所示,所述反转电路包括输入模块101和输出模块102。所述输入模块101分别与第一输入端GO、第一电压端VGH、第二电压端VGL、第一信号端CK2、第二信号端CB2以及第一节点P1连接。所述输入模块101用于根据所述第一输入端GO、第一电压端VGH、第二电压端VGL、第一信号端CK2和第二信号端CB2的输入信号控制所述第一节点P1的电位。所述输出模块102分别与第一节点P1、第一输入端GO、第三电压端VGH、第三信号端VGH-1以及第一输出端EM连接。所述输出模块102用于在所述第一节点P1的电位控制下根据所述第一输入端GO、第三电压端VGH和第三信号端VGH-1的输入信号控制所述第一输出端EM的输出信号。本实施例提供的反转电路通过分时驱动的方式在触控阶段将发光控制信号关闭,以降低触控电极的对地电容,从而降低了触控电极的阻容负载,提高了触控驱动频率,最终提高了触控精度。
参见图1,所述输入模块101包括第一晶体管M1、第二晶体管M2和第一电容C1。所述第一晶体管M1的栅极与所述第一输入端GO连接,所述第一晶体管M1的第一极与所述第一电压端VGH连接,所述第一晶体管M1的第二极与所述第一节点P1连接。所述第二晶体管M2的栅极与所述第一信号端CK2连接,所述第二晶体管M2的第一极与所述第一节点P1连接,所述第二晶体管M2的第二极与所述第二电压端VGL连接。所述第一电容C1并联于所述第一节点P1与所述第二信号端CB2之间。
参见图1,所述输出模块102包括第三晶体管M3和第四晶体管M4。所述第三晶体管M3的栅极与所述第一输入端GO连接,所述第三晶体管M3的第一极与所述第三电压端VGH连接,所述第三晶体管M3的第二极与所述第一输出端EM连接。所述第四晶体管M4的栅极与所述第一节点P1连接,所述第四晶体管M4的第一极与所述第一输出端连接,所述第四晶体管M4的第二极与所述第三信号端VGL-1连接。
图2为本发明实施例一提供的一种像素电路的结构示意图,图3为图2所示像素电路的工作时序图。如图2和图3所示,晶体管M7为驱动晶体管,其它晶体管为开关晶体管。具体来说,在重置阶段,电压信号Reset为低电平,电压信号Gate为高电平,电压信号EM为高电平,电压信号Vint为低电平,电压信号ELVDD为低电平,电压信号ELVSS为低电平,电压信号Vdata为低电平。此时,晶体管M5导通,其他晶体管断开,将之前的电压信号进行复位。
在缓冲阶段,电压信号Reset为高电平,电压信号Gate为低电平,电压信号EM为高电平,电压信号Vint为低电平,电压信号ELVDD为低电平,电压信号ELVSS为低电平,电压信号Vdata为高电平。此时,晶体管M6、晶体管M7、晶体管M9导通,晶体管M5、晶体管M8、晶体管M10断开,驱动晶体管M7导通,电压信号Vdata对第二节点P2进行充电,使得第二节点P2的电压为Vdata-Vth。
在发光阶段,电压信号Reset为高电平,电压信号Gate为高电平,电压信号EM为低电平,电压信号Vint为低电平,电压信号ELVDD为低电平,电压信号ELVSS为低电平,电压信号Vdata为低电平。此时,晶体管M7、晶体管M8、晶体管M10导通,发光器件OLED开始发光。
由薄膜晶体管的饱和电流公式可以得出:
IOLED=K(VGS-Vth)2
=K[Vdd-(Vdata-Vth)-Vth]2
=K(Vdd-Vdata)2
可以看出,工作电流IOLED不受阈值电压Vth的影响,只与电压信号Vdd和电压信号Vdata有关,从而解决了驱动晶体管的阈值电压Vth漂移的问题,消除了阈值电压Vth对IOLED的影响,保证了发光器件OLED的正常工作。
在触控阶段,电压信号Reset为高电平,电压信号Gate为高电平,电压信号EM为高电平,电压信号Vint为低电平,电压信号ELVDD为低电平,电压信号ELVSS为低电平,电压信号Vdata为低电平。此时,晶体管M8与晶体管M10断开,阴极(触控电极)开始加载触控驱动信号。此时,阳极不加载任何驱动信号,以降低触控电极的对地电容,从而降低了触控电极的阻容负载,提高了触控驱动频率,最终提高了触控精度。
图4为本发明实施例一提供的一种移位寄存器的结构示意图,图5为图4所示移位寄存器的工作时序图。如图4和图5所示,过程1:当电压信号STV2为低电平,电压信号CK2为低电平,电压信号CB2为高电平时,输出信号GO为高电平;过程2:当电压信号STV2为高电平,电压信号CK2为高电平,电压信号CB2为低电平时,输出信号GO为低电平;过程3:当电压信号STV2为高电平,电压信号CK2为低电平,电压信号CB2为高电平时,输出信号GO为高电平;过程4:当电压信号STV2为高电平,电压信号CK2为高电平,电压信号CB2为低电平时,输出信号GO为高电平;过程5:当电压信号STV2为高电平,电压信号CK2为低电平,电压信号CB2为高电平时,输出信号GO为高电平。
本实施例提供的反转电路包括输入模块和输出模块,所述输入模块用于根据第一输入端、第一电压端、第二电压端、第一信号端和第二信号端的输入信号控制所述第一节点的电位,所述输出模块用于在第一节点的电位控制下根据第一输入端、第三电压端和第三信号端的输入信号控制所述第一输出端的输出信号。本实施例提供的技术方案通过分时驱动的方式在触控阶段将发光控制信号关闭,以降低触控电极的对地电容,从而降低了触控电极的阻容负载,提高了触控驱动频率,最终提高了触控精度。
实施例二
图6为本发明实施例二提供的一种反转电路的驱动方法的流程图,图7为本发明实施例二提供的一种反转电路的工作时序图。如图6和图7所示,所述反转电路包括实施例一提供的反转电路,具体内容可参照实施例一的描述,此处不再赘述。
本实施例中,所述第一电压端VGH为高电平,所述第二电压端VGL为低电平,所述第三电压端VGH为高电平,所述反转电路的驱动方法包括:
步骤1001、第一阶段,所述第一输入端输入高电平,所述第一信号端输入低电平,所述第二信号端输入高电平,所述第三信号端输入低电平。
本实施例中,所述第一输入端GO输入高电平,所述第一信号端CK2输入低电平,所述第二信号端CB2输入高电平,所述第三信号端VGL-1输入低电平。此时,第一晶体管M1断开,第二晶体管M2导通,第一节点P1为低电平,第四晶体管M4导通,第三晶体管M3断开,第一输出端EM输出低电平。
步骤1002、第二阶段,所述第一输入端输入低电平,所述第一信号端输入高电平,所述第二信号端输入低电平,所述第三信号端输入低电平。
本实施例中,所述第一输入端GO输入低电平,所述第一信号端CK2输入高电平,所述第二信号端CB2输入低电平,所述第三信号端VGL-1输入低电平。此时,第一晶体管M1导通,第二晶体管M2断开,第一节点P1为高电平,第四晶体管M4断开,第三晶体管M3导通,第一输出端EM输出高电平。
步骤1003、第三阶段,所述第一输入端输入高电平,所述第一信号端输入低电平,所述第二信号端输入高电平,所述第三信号端输入低电平。
本实施例中,所述第一输入端GO输入高电平,所述第一信号端CK2输入低电平,所述第二信号端CB2输入高电平,所述第三信号端VGL-1输入低电平。此时,第一晶体管M1断开,第二晶体管M2导通,第一节点P1为低电平,第四晶体管M4导通,第三晶体管M3断开,第一输出端EM输出低电平。
步骤1004、第四阶段,所述第一输入端输入高电平,所述第一信号端输入高电平,所述第二信号端输入低电平,所述第三信号端输入低电平。
本实施例中,所述第一输入端GO输入高电平,所述第一信号端CK2输入高电平,所述第二信号端CB2输入低电平,所述第三信号端VGL-1输入低电平。此时,第一晶体管M1断开,第二晶体管M2断开,第一节点P1保持低电平,第四晶体管M4导通,第三晶体管M3断开,第一输出端EM输出低电平。
步骤1005、第五阶段,所述第一输入端输入高电平,所述第一信号端输入低电平,所述第二信号端输入高电平,所述第三信号端输入高电平。
本实施例中,所述第一输入端GO输入高电平,所述第一信号端CK2输入低电平,所述第二信号端CB2输入高电平,所述第三信号端VGL-1输入高电平。此时,第一晶体管M1断开,第二晶体管M2导通,第一节点P1为低电平,第四晶体管M4导通,第三晶体管M3断开,第一输出端EM输出高电平。第五阶段为控制阶段,阴极(触控电极)开始加载触控驱动信号,阳极不加载任何驱动信号,以降低触控电极的对地电容,从而降低了触控电极的阻容负载,提高了触控驱动频率,最终提高了触控精度。
本实施例提供的反转电路的驱动方法中,所述反转电路包括输入模块和输出模块,所述输入模块用于根据第一输入端、第一电压端、第二电压端、第一信号端和第二信号端的输入信号控制所述第一节点的电位,所述输出模块用于在第一节点的电位控制下根据第一输入端、第三电压端和第三信号端的输入信号控制所述第一输出端的输出信号。本实施例提供的技术方案通过分时驱动的方式在触控阶段将发光控制信号关闭,以降低触控电极的对地电容,从而降低了触控电极的阻容负载,提高了触控驱动频率,最终提高了触控精度。
实施例三
图8为本发明实施例三提供的一种触控显示面板的结构示意图。如图8所示,所述触控显示面板包括实施例一提供的反转电路,具体内容可参照实施例一的描述,此处不再赘述。
参见图8,所述触控显示面板包括基板,所述基板上设置有薄膜晶体管,所述薄膜晶体管上设置有发光二极管,所述发光二极管包括阳极、发光层和阴极,所述阴极包括至少一个触控电极,所述触控电极的上方设置有感应电极,所述触控电极与所述感应电极相互垂直形成触摸感应矩阵。
本实施例中,所述触控电极与所述感应电极相互垂直排列形成双层结构。所述触控电极与所述感应电极的外周分别设置有导线将所述触控电极与所述感应电极连接至控制电路。实际应用中,当没有任何导电物体接近时,各个电极之间具有固定的耦合电容,此时电极之间的电场固定分布,控制电路对上述耦合电容值进行监控。当人体手指接触到触控显示面板时,原本固定分布在每个电极上的电场因为手指的接触而产生变化,从而在接触点形成一个新的电容,进而改变接触点的电容值。控制电路监控到接触点的电容值的变化,从而能够定位接触点,最终实现触控功能。
参见图8,所述触控显示面板还包括封装玻璃和保护玻璃,所述封装玻璃设置在所述感应电极和所述触控电极之间,所述保护玻璃设置在所述感应电极之上。本实施例通过对阴极进行分割以形成触控电极,所述触控电极为条状电极。
在显示阶段,所述阳极和所述阴极加载显示驱动信号,以实现显示功能。在触控阶段,所述触控电极(阴极)和所述感应电极加载触控驱动信号,所述阳极不加载任何驱动信号,以降低触控电极的对地电容,从而降低了触控电极的阻容负载,提高了触控驱动频率,最终提高了触控精度。
本实施例提供的触控显示面板中,所述反转电路包括输入模块和输出模块,所述输入模块用于根据第一输入端、第一电压端、第二电压端、第一信号端和第二信号端的输入信号控制所述第一节点的电位,所述输出模块用于在第一节点的电位控制下根据第一输入端、第三电压端和第三信号端的输入信号控制所述第一输出端的输出信号。本实施例提供的技术方案通过分时驱动的方式在触控阶段将发光控制信号关闭,以降低触控电极的对地电容,从而降低了触控电极的阻容负载,提高了触控驱动频率,最终提高了触控精度。
实施例四
本实施例提供一种触控显示装置,包括实施例三提供的触控显示面板,具体内容可参照实施例三的描述,此处不再赘述。
本实施例提供的触控显示装置中,所述反转电路包括输入模块和输出模块,所述输入模块用于根据第一输入端、第一电压端、第二电压端、第一信号端和第二信号端的输入信号控制所述第一节点的电位,所述输出模块用于在第一节点的电位控制下根据第一输入端、第三电压端和第三信号端的输入信号控制所述第一输出端的输出信号。本实施例提供的技术方案通过分时驱动的方式在触控阶段将发光控制信号关闭,以降低触控电极的对地电容,从而降低了触控电极的阻容负载,提高了触控驱动频率,最终提高了触控精度。
可以理解的是,以上实施方式仅仅是为了说明本发明的原理而采用的示例性实施方式,然而本发明并不局限于此。对于本领域内的普通技术人员而言,在不脱离本发明的精神和实质的情况下,可以做出各种变型和改进,这些变型和改进也视为本发明的保护范围。
Claims (9)
1.一种反转电路,其特征在于,包括输入模块和输出模块;
所述输入模块分别与第一输入端、第一电压端、第二电压端、第一信号端、第二信号端以及第一节点连接,用于根据所述第一输入端、第一电压端、第二电压端、第一信号端和第二信号端的输入信号控制所述第一节点的电位;
所述输出模块分别与第一节点、第一输入端、第三电压端、第三信号端以及第一输出端连接,用于在所述第一节点的电位控制下根据所述第一输入端、第三电压端和第三信号端的输入信号控制所述第一输出端的输出信号。
2.根据权利要求2所述的反转电路,其特征在于,所述输入模块包括第一晶体管、第二晶体管和第一电容;
所述第一晶体管的栅极与所述第一输入端连接,所述第一晶体管的第一极与所述第一电压端连接,所述第一晶体管的第二极与所述第一节点连接;
所述第二晶体管的栅极与所述第一信号端连接,所述第二晶体管的第一极与所述第一节点连接,所述第二晶体管的第二极与所述第二电压端连接;
所述第一电容并联于所述第一节点与所述第二信号端之间。
3.根据权利要求1所述的反转电路,其特征在于,所述输出模块包括第三晶体管和第四晶体管;
所述第三晶体管的栅极与所述第一输入端连接,所述第三晶体管的第一极与所述第三电压端连接,所述第三晶体管的第二极与所述第一输出端连接;
所述第四晶体管的栅极与所述第一节点连接,所述第四晶体管的第一极与所述第一输出端连接,所述第四晶体管的第二极与所述第三信号端连接。
4.一种反转电路的驱动方法,其特征在于,所述反转电路包括权利要求1至3任一所述的反转电路,所述第一电压端为高电平,所述第二电压端为低电平,所述第三电压端为高电平,所述反转电路的驱动方法包括:
第一阶段,所述第一输入端输入高电平,所述第一信号端输入低电平,所述第二信号端输入高电平,所述第三信号端输入低电平;
第二阶段,所述第一输入端输入低电平,所述第一信号端输入高电平,所述第二信号端输入低电平,所述第三信号端输入低电平;
第三阶段,所述第一输入端输入高电平,所述第一信号端输入低电平,所述第二信号端输入高电平,所述第三信号端输入低电平;
第四阶段,所述第一输入端输入高电平,所述第一信号端输入高电平,所述第二信号端输入低电平,所述第三信号端输入低电平;
第五阶段,所述第一输入端输入高电平,所述第一信号端输入低电平,所述第二信号端输入高电平,所述第三信号端输入高电平。
5.一种触控显示面板,其特征在于,包括权利要求1至3任一所述的反转电路,所述触控显示面板还包括基板,所述基板上设置有薄膜晶体管,所述薄膜晶体管上设置有发光二极管,所述发光二极管包括阳极、发光层和阴极,所述阴极包括至少一个触控电极,所述触控电极的上方设置有感应电极,所述触控电极与所述感应电极相互垂直形成触摸感应矩阵;
所述触控电极和所述感应电极用于在触控阶段加载触控驱动信号;
所述阳极用于在触控阶段不加载任何驱动信号。
6.根据权利要求5所述的触控显示面板,其特征在于,所述薄膜晶体管包括栅极、有源层、源极和漏极,所述阳极与所述漏极连接;
所述阳极和所述阴极用于在显示阶段加载显示驱动信号。
7.根据权利要求5所述的触控显示面板,其特征在于,还包括封装玻璃和保护玻璃,所述封装玻璃设置在所述感应电极和所述触控电极之间,所述保护玻璃设置在所述感应电极之上。
8.根据权利要求5所述的触控显示面板,其特征在于,所述触控电极的形状为条状电极。
9.一种触控显示装置,其特征在于,包括权利要求5-8任一所述的触控显示面板。
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